1926. That 'the angel of Jehovah' here is the interior thought which came from the Lord's Internal is clear, as stated, from the train of thought. Here the term interior is used to mean that with the Lord which was united to Jehovah, or His Internal. Union was not accomplished all at once but step by step, that is to say, from earliest childhood through to the last stage of His life in the world, above all by means of temptations and victories. Each temptation and victory brought about union and to the extent He united Himself with His Internal or Jehovah, thought became more interior, and intellectual truth more united to Divine Good. It is the thought such as this that is meant by interior thought flowing from the Lord's Internal and that is specifically represented and meant here by 'the angel of Jehovah'.
Arcana Coelestia #6282
6282. 'May he bless the boys' means, May he make it possible for them to have truth and goodness. This is clear from the meaning of 'blessing' as endowing with truth and goodness, for in the spiritual sense 'a blessing' does not imply anything else, 1420, 1422, 4981; and from the representation of Ephraim and Manasseh, to whom 'the boys' refers here, as the Church's understanding and the Church's will, to which truth and good were to be imparted, truth to its understanding and good to its will.